<!--
 * @Author: jswang
 * @Date: 2021-07-12 15:28:31
 * @LastEditTime: 2021-07-14 10:37:09
-->
<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- expand 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 栅格系统 -->
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <!-- icon图标 -->
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级权限 三级权限-->
              <el-col :span="19">
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="i2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag
                      closable
                      type="success"
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      closable
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      type="warning"
                      :class="[i3 === 0 ? '' : 'bdtop']"
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"> </el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"> </el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            {{ scope.row.status }}
            <el-button type="primary" icon="el-icon-edit" size="mini"
              >编辑</el-button
            >
            <el-button type="danger" icon="el-icon-delete" size="mini"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- tree树形控件 -->
      <el-tree
        ref="treeRef"
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defkeys"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      roleList: [],
      //控制分配权限对话框显示与隐藏
      setRightDialogVisible: false,
      //所有权限数据
      rightslist: [],
      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点id值数组
      defkeys: [],
      //当前即将分配权限的角色Id
      roleId:'',
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(error => error)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      //发起删除网络请求
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return sthis.$message.error('删除权限失败')
      }
      //刷新权限列表
      // this.getRolesList()
      //为当前角色信息赋值
      role.children = res.data
    },
    //展示分配权限对话框
    async showSetRightDialog(role) {
      //拿到角色id
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      //把获取到的权限数据保存到data中
      this.rightslist = res.data
      //递归获取三级节点id
      this.getLeafKeys(role, this.defkeys)
      // 显示对话框
      this.setRightDialogVisible = true
    },
    //通过递归的形式获取角色下所有三级权限的Id ,并保存到defkeys 中
    getLeafKeys(node, arr) {
      //判断是否包含 children 属性, 包含children 属性就不是三级权限,不包含children 则是三级权限
      if (!node.children) {
        // return this.$message.error("");
        return arr.push(node.id)
      }
      //不是三级节点,进一步调用递归获取三级节点
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      //关闭 分配权限对话框,清空里面的值
      this.defkeys = []
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [
        //展开运算符  合并称为新数组
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //将数组 转换为 以逗号分隔的字符串
      const idStr = keys.join(',')
      const {data:res } = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !== 200){
        return this.$message.error("分配权限失败")
      }
      this.$message.success("分配权限成功")
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
